package com.example.demo.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceeptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        Object loginUser =  request.getSession().getAttribute("loginUser");

        if(loginUser == null){
            request.setAttribute("msg","没有权限，请先登录！");
            request.getRequestDispatcher("/login.html").forward(request,response);
            return  false;
        }else {
            return  true;
        }
    }
}
